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AN3338 bảng dữ liệu(PDF) 22 Page - STMicroelectronics

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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN3338 bảng dữ liệu(HTML) 22 Page - STMicroelectronics

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Electrical characteristics and functions
AN3338
22/72
Doc ID 18441 Rev 4
2.3.4
Dead time and interlocking function management
In order to prevent any possible cross-conduction between high side and low side IGBTs,
the SLLIMM provides both the dead time and the interlocking functions. The interlocking
function is a logic operation which sets both the outputs to low level when the inputs are
simultaneously active. The dead time function is a safety time introduced by the device
between the falling edge transition of one driver output and the rising edge of the other
output. If the rising edge set externally by the user occurs before the end of this dead time, it
is ignored and results as delayed until the end of the dead time.
The dead time is internally set at 320 ns as the typical value of STGIPS10K60A.
Figure 13. Timing chart of undervoltage lockout function
Time
t2
t3
t4
RESET
Circuit state
t1
SET
RESET
VCC_thON
t5
VCC_thOFF
I
C
V
CC
HIN/LIN
Table 7. Interlocking function truth table of STGIPS10K60A
Condition
Logic input (VI)
Outputs
LIN
HIN
LVG
HVG
Interlocking
half bridge tri-state
HH
L
L
0 “logic state”
half bridge tri-state
LLLL
1 “logic state”
low side direct driving
HL
H
L
1 “logic state”
high side direct driving
LH
L
H



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